how to add/remove from website

Hi, I am new to cpanel. I have uploaded a website through cpanel and I want to update/delete areas on the website daily. Not exactly sure how to go about this. Does the new changed website overwrite the original and remove or add info etc? Or do I have to design a new website and upload each time?
Thanks for your help.
Duffysnr.

Hi, I am new to cpanel. I have uploaded a website through cpanel and I want to update/delete areas on the website daily. Not exactly sure how to go about this. Does the new changed website overwrite the original and remove or add info etc? Or do I have to design a new website and upload each time?
Thanks for your help.
Duffysnr.